WO1999006692A1 - Kraftstoffeinspritzdüse - Google Patents
Kraftstoffeinspritzdüse Download PDFInfo
- Publication number
- WO1999006692A1 WO1999006692A1 PCT/DE1998/000620 DE9800620W WO9906692A1 WO 1999006692 A1 WO1999006692 A1 WO 1999006692A1 DE 9800620 W DE9800620 W DE 9800620W WO 9906692 A1 WO9906692 A1 WO 9906692A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- fuel injection
- nozzle body
- hardened
- seat surface
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/166—Selection of particular materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S239/00—Fluid sprinkling, spraying, and diffusing
- Y10S239/19—Nozzle materials
Definitions
- the invention relates to a fuel injection nozzle for internal combustion engines with a nozzle body, in which a valve needle with a sealing surface is slidably mounted, which comes to rest on a sealing surface adapted to it, which is formed on an inner wall region of an end cap of the nozzle body and in which at least one spray hole is provided , both the inner wall area with the sealing surface of the nozzle body arranged on it and its outer wall area being hardened.
- Such a fuel injection nozzle for internal combustion engines can be found, for example, in EP 0 233 190 B1.
- the inner wall area of the end cap provided with the valve seat surface is provided with a greater hardness by hardening the outer layer than the outer wall area and that between the valve seat surface and the central edge area lying opposite the outer wall area.
- the nozzle body of these fuel injection nozzles consists of case-hardened steel, which is carburized differently to form the different degrees of hardness.
- Such fuel injectors are used, for example, in diesel fuel injection systems where they are exposed to very high temperatures. If, for example, diesel engines provided with direct injection are operated in engine braking mode, very high temperatures can arise at the diesel injection nozzles, as a result of which they are "soft-annealed” and can thus become unsuitable for further operation (wear, risk of breakage).
- the invention is therefore based on the object of improving a generic fuel injector in such a way that it can be used at very high temperatures on the one hand, in particular the soft annealing mentioned above in connection with diesel engines should be avoided and on the other hand it has a high corrosion resistance, so that use in direct petrol injection systems is also possible.
- the fuel injector should be able to be manufactured in the simplest possible and therefore inexpensive manner.
- a fuel injection nozzle of the type described in the introduction in that the nozzle body consists of a stainless martensitic steel which is hardened by case hardening with nitrogen.
- the spray holes are hardened.
- Suitable stainless martensitic steels are advantageously steels with the following composition: ⁇ 0.1, preferably 0.01% by weight C; from 0.03 to 0.3, preferably 0.1% by weight N; from 0.01 to 1.0, preferably 0.06% by weight of Si; from 10.0 to 20.0, preferably 13.7% by weight of Cr; ⁇ 5.0, preferably 1.5% by weight Mo; ⁇ 0.5, preferably 0% by weight Nb; ⁇ 0.5, preferably 0.1% by weight V and alloy additives for suppressing ⁇ -ferrite.
- alloy additives of the following composition are preferably used: from 0.01 to 1.0, preferably 0.03% by weight of Mn; ⁇ 5.0, preferably 2.2% by weight Ni; ⁇ 5.0, preferably 2.7% by weight of Co is added.
- the nozzle body is advantageously hardened at a temperature of 1050 to 1200 ° C, preferably at 1100 ° C, at a pressure of 0.5 to 10 bar, preferably at 3 bar over a period of 1 h to 30 h, preferably 4 h hardened.
- the advantages are: There is a better machinability of the unhardened starting material.
- the surface layer hardening takes place with a high level of production reliability, which leads to uniform surface hardness and hardening, in particular also in the bores forming the spray holes, without there being any cleaning problems.
- Due to a simple production the Fuel injection nozzles are not only produced in a technically simple manner, but also particularly cost-effectively, it not being necessary to differentiate between fuel injection nozzles for diesel injection systems and fuel injection nozzles for gasoline injection systems.
- the figure schematically shows a longitudinal section through the injection-side end section of an exemplary embodiment of a fuel injection nozzle.
- the invention is explained schematically on the basis of a fuel injection nozzle for a diesel internal combustion engine. It is understood that the invention is not limited to fuel injection nozzles for diesel engines, but also extends to fuel injection nozzles for gasoline direct injection systems.
- the injection nozzle shown in FIG. 1 has a nozzle body 10, in which a valve needle 20 is slidably mounted.
- the valve needle 20 has at its lower end a conical sealing surface 22 which comes into contact with a valve seat surface 12 which is adapted to it and is therefore conical.
- the valve seat surface 12 is formed on an inner wall region 31 of an end cap 30 of the nozzle body 10. From the valve seat surface 12 go out of several spray holes 32 which pierce the wall of the end cap 30 at an angle to the nozzle axis.
- An annular space 13 is formed between the valve needle 20 and a cylindrical inner wall of the nozzle body 10, into which an unillustrated fuel supply line opens.
- the valve needle 20 is pressed against the valve seat surface 12 by a valve spring, also not shown.
- the valve needle 20 is raised against the force of the valve spring and the fuel is sprayed out through the spray holes 32.
- the cone angle of the sealing surface 22 on the valve needle 20 can be selected to be somewhat larger than the angle of the valve seat surface 12, so that the highest sealing press force results initially at the upper edge 24 of the sealing surface 22.
- the sealing surface 22 can also be spherical and the valve seat surface and the end cap 30 can be hollow.
- the spray holes 32 can also be arranged below the sealing surface 22 in the end cap 30.
- the fuel injector may corrode, so that its safe function is not guaranteed.
- the fuel injector is made of a stainless martensitic steel, for example of the following composition: 0.01% by weight C; 0.1% by weight N; 0.06% by weight Si; 13.7% by weight of Cr; 1.5% by weight Mo; 0.1% by weight of V and alloy additives for suppressing ⁇ -ferrite of the following composition: 0.03% by weight of Mn; 2.2% by weight Ni; 2.7% by weight of Co which is hardened by case hardening with nitrogen.
- the case hardening with nitrogen is preferably carried out at a temperature of 1100 ° C. and a pressure of 3 bar over a period of 4 hours.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/269,667 US6168095B1 (en) | 1997-07-31 | 1998-03-04 | Fuel injector for an internal combustion engine |
JP51033199A JP2001504192A (ja) | 1997-07-31 | 1998-03-04 | 燃料噴射ノズル |
DE59807000T DE59807000D1 (de) | 1997-07-31 | 1998-03-04 | Kraftstoffeinspritzdüse |
EP98916834A EP0929742B1 (de) | 1997-07-31 | 1998-03-04 | Kraftstoffeinspritzdüse |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29713628U DE29713628U1 (de) | 1997-07-31 | 1997-07-31 | Kraftstoffeinspritzdüse |
DE29713628.3 | 1997-07-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999006692A1 true WO1999006692A1 (de) | 1999-02-11 |
Family
ID=8043949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1998/000620 WO1999006692A1 (de) | 1997-07-31 | 1998-03-04 | Kraftstoffeinspritzdüse |
Country Status (5)
Country | Link |
---|---|
US (1) | US6168095B1 (de) |
EP (1) | EP0929742B1 (de) |
JP (1) | JP2001504192A (de) |
DE (2) | DE29713628U1 (de) |
WO (1) | WO1999006692A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1302657A1 (de) * | 2001-10-16 | 2003-04-16 | Hitachi, Ltd. | Kaftstoffeinspritzventil, Düsenkörper und Verfahren zur Herstellung einer zylindrischen fluidführenden Leitung |
EP1659284A1 (de) | 2004-11-17 | 2006-05-24 | Denso Corporation | Kraftstoffeinspritzdüse und Herstellungsverfahren |
WO2018091183A1 (de) * | 2016-11-21 | 2018-05-24 | Robert Bosch Gmbh | Komponente, die zum führen und/oder speichern von zumindest einem fluid und insbesondere für eine brennstoffeinspritzanlage dient, brennstoffeinspritzanlage und verfahren zur herstellung einer komponente |
CN113446141A (zh) * | 2020-03-27 | 2021-09-28 | 日立安斯泰莫株式会社 | 直喷式燃料喷射阀 |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3630076B2 (ja) * | 2000-05-30 | 2005-03-16 | 株式会社デンソー | 弁装置 |
JP3908491B2 (ja) * | 2001-08-03 | 2007-04-25 | 株式会社日立製作所 | 電子燃料噴射弁 |
DE10147205C1 (de) * | 2001-09-25 | 2003-05-08 | Bosch Gmbh Robert | Verfahren zur Wärmebehandlung von Werkstücken aus temperaturbeständigen Stählen |
DE10261175A1 (de) * | 2002-12-20 | 2004-07-08 | Daimlerchrysler Ag | Schieberventil |
WO2004070200A1 (ja) * | 2003-02-04 | 2004-08-19 | Mitsubishi Denki Kabushiki Kaisha | 燃料噴射弁 |
DE102004039926B4 (de) * | 2004-08-18 | 2016-09-22 | Robert Bosch Gmbh | Verfahren zur Herstellung eines temperatur- und korrosionsbeständigen Kraftstoffinjektorkörpers |
US7198207B2 (en) * | 2004-11-05 | 2007-04-03 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7137577B2 (en) * | 2004-11-05 | 2006-11-21 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7104475B2 (en) * | 2004-11-05 | 2006-09-12 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7168637B2 (en) * | 2004-11-05 | 2007-01-30 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7051957B1 (en) * | 2004-11-05 | 2006-05-30 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7438241B2 (en) * | 2004-11-05 | 2008-10-21 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7124963B2 (en) * | 2004-11-05 | 2006-10-24 | Visteon Global Technologies, Inc. | Low pressure fuel injector nozzle |
US7185831B2 (en) * | 2004-11-05 | 2007-03-06 | Ford Motor Company | Low pressure fuel injector nozzle |
US8029627B2 (en) * | 2006-01-31 | 2011-10-04 | Vacuumschmelze Gmbh & Co. Kg | Corrosion resistant magnetic component for a fuel injection valve |
US20070176025A1 (en) * | 2006-01-31 | 2007-08-02 | Joachim Gerster | Corrosion resistant magnetic component for a fuel injection valve |
FR2908838A1 (fr) | 2006-11-20 | 2008-05-23 | Peugeot Citroen Automobiles Sa | Injecteur de carburant muni d'une aiguille creuse |
JP4948295B2 (ja) * | 2007-07-06 | 2012-06-06 | 愛三工業株式会社 | 燃料噴射弁 |
US9057115B2 (en) * | 2007-07-27 | 2015-06-16 | Vacuumschmelze Gmbh & Co. Kg | Soft magnetic iron-cobalt-based alloy and process for manufacturing it |
US20100025500A1 (en) | 2008-07-31 | 2010-02-04 | Caterpillar Inc. | Materials for fuel injector components |
AT511880B1 (de) * | 2011-09-06 | 2013-12-15 | Bosch Gmbh Robert | Verschleissoptimierte herstellung von konischen spritzlöchern |
CN109082608A (zh) * | 2018-10-26 | 2018-12-25 | 成都先进金属材料产业技术研究院有限公司 | 控制低铬不锈钢中δ铁素体含量的方法 |
DE112020007531T5 (de) | 2020-10-15 | 2023-06-22 | Cummins Inc. | Kraftstoffsystemkomponenten |
CA3235020A1 (en) * | 2021-10-14 | 2023-04-20 | Icom North America Llc | High flow inline air/fuel vortex injection system for internal combustion engines |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0233190A1 (de) | 1985-08-10 | 1987-08-26 | Bosch Gmbh Robert | Kraftstoff-einspritzdüse für brennkraftmaschinen. |
DE4033706A1 (de) * | 1990-10-24 | 1991-02-21 | Hans Prof Dr Ing Berns | Einsatzhaerten mit stickstoff zur verbesserung des korrosionswiderstandes martensitischer nichtrostender staehle |
US5239751A (en) * | 1990-11-24 | 1993-08-31 | Hitachi, Ltd. | Method of producing nozzle for solenoid valve |
JPH0658218A (ja) * | 1992-08-10 | 1994-03-01 | Hitachi Ltd | 高耐食燃料噴射装置 |
DE4413564A1 (de) * | 1993-04-19 | 1994-10-20 | Hitachi Metals Ltd | Hochfester nichtrostender Stahl zur Verwendung als Material von Kraftstoffeinspritzdüse oder -nadel für Brennkraftmaschine, aus dem nichtrostenden Stahl hergestellte Kraftstoffeinspritzdüse und Verfahren zur Herstellung der Kraftstoffeinspritzdüse |
JPH0754736A (ja) * | 1993-05-11 | 1995-02-28 | Honda Motor Co Ltd | 燃料噴射弁の弁体または弁座 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2713100B1 (fr) * | 1993-11-30 | 1996-01-05 | Rossignol Sa | Ski. |
-
1997
- 1997-07-31 DE DE29713628U patent/DE29713628U1/de not_active Expired - Lifetime
-
1998
- 1998-03-04 DE DE59807000T patent/DE59807000D1/de not_active Expired - Lifetime
- 1998-03-04 EP EP98916834A patent/EP0929742B1/de not_active Expired - Lifetime
- 1998-03-04 US US09/269,667 patent/US6168095B1/en not_active Expired - Fee Related
- 1998-03-04 WO PCT/DE1998/000620 patent/WO1999006692A1/de active IP Right Grant
- 1998-03-04 JP JP51033199A patent/JP2001504192A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0233190A1 (de) | 1985-08-10 | 1987-08-26 | Bosch Gmbh Robert | Kraftstoff-einspritzdüse für brennkraftmaschinen. |
EP0233190B1 (de) * | 1985-08-10 | 1989-12-20 | Robert Bosch Gmbh | Kraftstoff-einspritzdüse für brennkraftmaschinen |
DE4033706A1 (de) * | 1990-10-24 | 1991-02-21 | Hans Prof Dr Ing Berns | Einsatzhaerten mit stickstoff zur verbesserung des korrosionswiderstandes martensitischer nichtrostender staehle |
US5239751A (en) * | 1990-11-24 | 1993-08-31 | Hitachi, Ltd. | Method of producing nozzle for solenoid valve |
JPH0658218A (ja) * | 1992-08-10 | 1994-03-01 | Hitachi Ltd | 高耐食燃料噴射装置 |
DE4413564A1 (de) * | 1993-04-19 | 1994-10-20 | Hitachi Metals Ltd | Hochfester nichtrostender Stahl zur Verwendung als Material von Kraftstoffeinspritzdüse oder -nadel für Brennkraftmaschine, aus dem nichtrostenden Stahl hergestellte Kraftstoffeinspritzdüse und Verfahren zur Herstellung der Kraftstoffeinspritzdüse |
JPH0754736A (ja) * | 1993-05-11 | 1995-02-28 | Honda Motor Co Ltd | 燃料噴射弁の弁体または弁座 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 297 (M - 1617) 7 June 1994 (1994-06-07) * |
PATENT ABSTRACTS OF JAPAN vol. 095, no. 005 30 June 1995 (1995-06-30) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1302657A1 (de) * | 2001-10-16 | 2003-04-16 | Hitachi, Ltd. | Kaftstoffeinspritzventil, Düsenkörper und Verfahren zur Herstellung einer zylindrischen fluidführenden Leitung |
US6976381B2 (en) | 2001-10-16 | 2005-12-20 | Hitachi, Ltd. | Fuel injector, nozzle body, and manufacturing method of cylindrical part equipped with fluid passage |
EP1659284A1 (de) | 2004-11-17 | 2006-05-24 | Denso Corporation | Kraftstoffeinspritzdüse und Herstellungsverfahren |
WO2018091183A1 (de) * | 2016-11-21 | 2018-05-24 | Robert Bosch Gmbh | Komponente, die zum führen und/oder speichern von zumindest einem fluid und insbesondere für eine brennstoffeinspritzanlage dient, brennstoffeinspritzanlage und verfahren zur herstellung einer komponente |
CN113446141A (zh) * | 2020-03-27 | 2021-09-28 | 日立安斯泰莫株式会社 | 直喷式燃料喷射阀 |
Also Published As
Publication number | Publication date |
---|---|
DE59807000D1 (de) | 2003-02-27 |
US6168095B1 (en) | 2001-01-02 |
EP0929742B1 (de) | 2003-01-22 |
EP0929742A1 (de) | 1999-07-21 |
DE29713628U1 (de) | 1998-11-26 |
JP2001504192A (ja) | 2001-03-27 |
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